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This keeps everything before a period:
gsub("\\..*","", data$column )
how to keep everything after the period?
899
To remove everything before the first occurrence of the character '-' in a string, pass the character '-' as a separator in the partition() function. Then assign the part after the separator to the original string variable. It will give an effect that we have deleted everything before the character '-' in a string.
If you need to remove everything before last occurrence of a character, use the str. rfind() method.
. trim() removes spaces before the first character (which isn't a whitespace, such as letters, numbers etc.) of a string (leading spaces) and also removes spaces after the last character (trailing spaces).
Using 'str. replace() , we can replace a specific character. If we want to remove that specific character, replace that character with an empty string. The str. replace() method will replace all occurrences of the specific character mentioned.
To remove all the characters before a period in a string(including period).
gsub("^.*\\.","", data$column )
Example:
> data <- 'foobar.barfoo'
> gsub("^.*\\.","", data)
[1] "barfoo"
To remove all the characters before the first period(including period).
> data <- 'foo.bar.barfoo'
> gsub("^.*?\\.","", data)
[1] "bar.barfoo"
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